Immobilization of Pyrene-Tagged Palladium and Ruthenium Complexes onto Reduced Graphene Oxide: An Efficient and Highly Recyclable Catalyst for Hydrodefluorination

Abstract

RECEIVED DATE (to be automatically inserted after your manuscript is accepted if required according to the journal that you are submitting your paper to) 2 ABSTRACTThe co-immobilization of palladium and ruthenium complexes with pyrene-tagged Nheterocyclic carbene ligands onto reduced grahene oxide allows the formation of a highly efficient catalyst for the hydrodefluorination of a series of fluoroarenes. This procedure constitutes an easy one-pot preparation of materials with homogeneously distributed polymetallic catalysts. The catalytic system can be recycled for up to twelve times without measurable loss of activity. The activity of the catalyst is attributed to the synergistic action of the two metals.

Catalytic Dehydrogenative Coupling of Hydrosilanes with Alcohols for the Production of Hydrogen On‐demand: Application of a Silane/Alcohol Pair as a Liquid Organic Hydrogen Carrier

“…Most probably, the rGO material is stabilizing the catalytic active species. We have observed a similar effect when using molecular catalysts immobilized on the surface of graphene for different catalytic reactions …”

“…An important issue to consider for the silane/alcohol pairs as a potential LOHC is that the catalyst should be recovered and reused at the end of the reaction. For that purpose, we evaluated the catalytic activity of a ruthenium complex immobilized on the surface of graphene by π–π interactions using a pyrenyl tag attached to the NHC ligand (see structure in Table and Figure ) . This supported catalyst has recently been developed by us and is very efficient in the dehydrogenation of alcohols and amines .…”

Modified Nanocarbons for Catalysis

“…The pyrene‐tagged ruthenium complex 101 c was also co‐immobilized with the palladium complex 102 onto the surface of rGO leading to the formation of the heterogeneous catalytic system 101 c‐102/rGO active in the hydrodefluorination of a series of fluoroarenes (Scheme ) . The synergistic action of the two metals in the hydrodefluorination reactions was previously proved by the authors using homo‐ and heterodimetallic homogenous complexes .…”

Catalytic Hydrogen Production by Ruthenium Complexes from the Conversion of Primary Amines to Nitriles: Potential Application as a Liquid Organic Hydrogen Carrier

“…[45,46] The immobilizationo fm olecular complexes on graphene by noncovalent interactions shows ac atalytic benefit compared to the molecular complexes most probably due to the increased stabilityo ft he catalytically active species. The resultss how that immobilization of complex 3 on the graphene surface increases the catalytic activity.F ull conversion was achievedi n6h, in contrast to the 8h required with molecular complex 3.T hese results support our previous catalytic studies using molecular complexes anchored on graphene.…”

“…[45,46] The catalytic properties of the hybrid materials in terms of activity and stability have demonstrated the potentialo ft ransition metalsi mmobilizedo ng ra-phene. [45,46] The catalytic properties of the hybrid materials in terms of activity and stability have demonstrated the potentialo ft ransition metalsi mmobilizedo ng ra-phene.…”